From the source you did not read:
"Economic development and fertility transitions:
A strong inverse relationship exists between economic development and fertility rates, though the causality runs in both directions. As countries develop economically:
-Child survival improves: Reducing the perceived need for multiple births
-Women’s education increases: Consistently associated with lower fertility preferences
-Urbanization accelerates: Urban living typically reduces desired family size
-Old-age security systems develop: Reducing reliance on children for support in later life
These factors explain why regions at different economic development stages show markedly different growth patterns. However, cultural factors also play an important role, explaining why some middle-income countries maintain higher fertility than their economic development level might predict."
Reading is wonderful! Or, you can blame Jews I guess.
https://socio.health/population-studies-introduction/rich-poor-regional-population-growth/
